曾母拉分盆地的油气成藏规律：廷贾-西巴兰线断裂的控制

赵斐宇; 姜素华; 李三忠; 孟凡顺; 曹伟; 汪刚; 张慧璇; 高嵩; 郑祺亮

doi:10.16562/j.cnki.0256-1492.2017.04.014

曾母拉分盆地的油气成藏规律：廷贾-西巴兰线断裂的控制

1.
海底科学与探测技术教育部重点实验室，青岛 266100

2.
中国海洋大学海洋地球科学学院，青岛 266100

基金项目:
国家自然科学基金杰出青年基金(41325009)；国家重点研发计划(2017YFC0601400-1)；山东省泰山学者特聘教授项目

详细信息

作者简介: 赵斐宇(1988—), 男，博士生，海洋地球物理专业，E-mail: zhaofeiyu1988@126.com

通讯作者: 姜素华(1963—)，女，博士，副教授，海洋地球物理专业，E-mail: jiangsuh@163.com

中图分类号: P618.13

周立君编辑

收稿日期: 2017-05-31

修回日期: 2017-07-20

刊出日期: 2017-08-28

HYDROCARBON ACCUMULATION IN ZENGMU PULL-APART BASIN:INSIGHTS FROM THE CONTROL OF TINJAR-WEST BARAM LINE

1.
Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Qingdao 266100, China

2.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China

More Information

Corresponding author: JIANG Suhua, jiangsuh@163.com

Received Date: 31 May 2017

Revised Date: 20 July 2017

Publish Date: 28 August 2017

摘要

摘要:
南海南部廷贾-西巴兰线断裂是一条规模巨大的北西向走滑断裂，渐新世开始活动，早期具有强烈的右旋走滑特征，晚中新世以来走滑方向变为左旋，更新世至今，走滑方向变为右旋，是曾母盆地与北康盆地、南沙海槽的分界。为了理清廷贾-西巴兰线断裂特征与曾母盆地油气成藏的关系，通过对断裂两侧地震剖面特征、重磁特征、地热流分布特征以及地壳性质和岩石圈厚度的分析，探讨该断裂在曾母盆地形成演化及油气成藏中的控制作用。研究表明：断裂活动为曾母盆地后期的沉积提供了丰富的物源，断裂走滑作用导致曾母盆地具有良好的圈闭，后期的反向走滑使得盆地的沉积中心由南向北迁移；断裂沟通深部热源，有利于油气生成，形成的伴生断层是盆地油气运移的主要通道。
- 廷贾-西巴兰线断裂 /
- 走滑作用 /
- 油气成藏 /
- 曾母盆地
Abstract:
The Tinjar-West Baram Line of the Southern South China Sea is a northwest-trending strike-slip fault. As the boundary between the Zengmu Basin and the Beikang Basin and Nansha Trough, the strike-slip fault of the Tinjar-West Baram Line was first activated in Oligocene as a intensely dextral strike-slip fault, then turned to sinistral after late Miocene and, then turned to dextral again since Pleistocene up to present. Based upon the study of seismic profiles, gravity and magnetic data, geothermal heat flux distribution data near the Tinjar-West Baram Line, we studied the crustal nature and lithosphere thickness of the Zengmu Basin, and discussed the control of Tinjar-West Baram Line over the evolution and accumulation of hydrocarbon in the Zengmu Basin. It is concluded that the faulting of the Tinjar-West Baram Line had provided rich source of sediments for the Zengmu Basin. The strike slipping of the faults helped the formation of the good traps in the Zengmu Basin, and the reversed strike slipping in the late period led to the northward motion of the basin depocenters. The faults are important channels to the deep heat source, beneficial to the hydrocarbon generation, and the secondary faults are also the major passages for hydrocarbon migration.
- Tinjar-West Baram Line /
- strike-slip fault /
- hydrocarbon accumulation /
- Zengmu Basin

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图 1 南海及邻区构造单元划分

Figure 1.

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图 2 南海南部盆地分布及曾母盆地次级构造单元划分

Figure 2.

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图 3 廷贾-西巴兰线断裂地震剖面

Figure 3.

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图 4 南沙地区布格重力(a)及化极磁异常(b)图

Figure 4.

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图 5 南海及其邻区地壳及岩石圈厚度分布

Figure 5.

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图 6 南海地区现今大地热流与油气田分布

Figure 6.

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图 7 曾母盆地新生代构造演化剖面

Figure 7.

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图 8 新生代东南亚板块重建

Figure 8.

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图 9 曾母盆地油气成藏模式

Figure 9.

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表 1 曾母盆地地层划分

Table 1. The stratigraphic column of the Zengmu Basin

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表 2 曾母盆地生储盖组合(修改自文献[44])

Table 2. Association of source rock, reservoir rock, seal rock in the Zengmu Basin (Modified after reference[44])

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